EUBCE 2026 - Constantina ZAFIRI - Optimization of Microalgal Cultivation Conditionsf or Enhanced Biostimulant and Biofertilizer Performance

Optimization of Microalgal Cultivation Conditionsf or Enhanced Biostimulant and Biofertilizer Performance

Short Introductive summary

Microalgae are being increasingly explored as a sustainable alternative to chemical fertilizers thanks to their ability to produce bioactive compounds and accumulate essential nutrients. In this study, selected microalgal strains, including Chlorella vulgaris and Chlorella sp., were cultivated under different temperature, light intensity, and photoperiod conditions using a Box–Behnken experimental design. Cultivation performance was evaluated in terms of biomass production, nutrient content, and biostimulant activity using plant bioassays. Preliminary results indicated a strong influence of cultivation conditions on both growth and bioactivity, with clear species-specific responses and interactions among the studied parameters. Differences between whole cultures and their respective supernatants suggest a contribution of extracellular compounds to biostimulant effects. These findings provide a basis for further optimization of microalgae-based systems toward sustainable agricultural applications.

E. Sventzouri, University of Patras, GREECE
E. Pagkaki, University of Patras, GREECE
C. Zafiri, University of Patras, GREECE
M. Kornaros, University of Patras, GREECE